And Khloe and her hubby Lamar Odom may not have made their own "bun in the oven" announcement yet, but the younger sister is also still happy for Kourtney.

"I am BEYOND thrilled to fiiiiinally be able to share with all of you the fabulous news that my beautiful big sister Kourtney is expecting yet again!" she wrote. "Can you believe it?! Masey is going to be a big brother!"

"We are all so overjoyed by this wonderful news and are counting down the minutes until we get to meet the newest member of our family," she added. "Kourtney is the greatest mom in the world and I am so proud of the woman she has become. I can’t wait to see her with a kid in each arm! She’ll be a pro. LOL. And if this next baby is anything like Mason, then we will truly be the luckiest family in the world."